Factual error: The footage of the Murmansk convoy firing at attacking German planes is actually Pacific footage of Kamikaze attacks. The density of the fire was only possible because of the lavish AA available then, unlike the meager AA of convoy escorts.
The Cruel Sea (1953)
1 factual error
Directed by: Charles Frend
Starring: Denholm Elliott, Jack Hawkins, Donald Sinden, John Stratton
Revealing mistake: In various scenes before the Compass Rose is supposed to be fitted with radar, it's obvious the 'lantern' round the already fitted radar aerial has been removed and the aerial itself covered with a tarpaulin to simulate the ship in its earlier, pre-radar, state.